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Gentoo Linux Security Advisory GLSA 201701-74 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: libpng: Remote execution of arbitrary code |
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Date: January 29, 2017 |
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Bugs: #604082 |
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ID: 201701-74 |
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Synopsis |
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======== |
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|
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A null pointer dereference in libpng might allow remote attackers to |
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execute arbitrary code. |
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Background |
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========== |
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|
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libpng is a standard library used to process PNG (Portable Network |
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Graphics) images. It is used by several programs, including web |
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browsers and potentially server processes. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 media-libs/libpng < 1.6.27 >= 1.6.27 |
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>= 1.5.28 |
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>= 1.2.57 |
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|
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Description |
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=========== |
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|
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A null pointer dereference was discovered in libpng in the |
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png_push_save_buffer function. In order to be vulnerable, an |
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application has to load a text chunk into the PNG structure, then |
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delete all text, then add another text chunk to the same PNG structure, |
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which seems to be an unlikely sequence, but it is possible. |
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|
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Impact |
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====== |
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|
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A remote attacker, by enticing a user to process a specially crafted |
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PNG file, could execute arbitrary code with the privileges of the |
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process. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All libpng 1.6.x users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.6.27" |
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All libpng 1.5.x users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.28:1.5" |
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All libpng 1.2.x users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.57:1.2" |
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|
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References |
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========== |
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[ 1 ] CVE-2016-10087 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-10087 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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https://security.gentoo.org/glsa/201701-74 |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2017 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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